Improvement in copying-inks for printing



-t2ttrr 'tiun of the ingredients, and manner of preparing the CHARLES MCILVAINE, til li'ilLADELPliiA, PENNSYLVPQILK.

Letters Patent No. 108,615, dated October 25, 1870,

IMPROVEMENT IN COPYiNG-INKS FOR PRiNTlNG.

The Schedule referred to in these Letters Patent am". making; part of the "lame To all whom, it may concern Be it known that, I; CHARLES Mclmzusn, oi the city and county of Philadelphia and Suite of Pennsylvania, have invented n new and Improvcil Uopyn1g-lnk for Printers Ugo null I do hereby declare that the i'oliowing is a i'uli, clenr, null exact ricscripsame.

The nnture of ill) invention consists in making, printers ink that will give a press-copy simiiar to the ordinary copying-ink nswi in writing. This 1 nccoun plish by using pigments or colrn'in z-umttcr of differcut shades, thni? urn soluble in water, or that, when mixed with soluble gums, thcy can no conveyorl by such gums.

To produce ink of n green color, 1 use four pants oi nialiori or aniline-green, tire parts of rmj'lr-cunrly or solnbie gum, thrcc parts of albumen, six parts of printers varnish, molasses, glyccrine, or other muterinls to give it the proper consistency.

To produce :1. I'Lti ink, I use thrcc parts nt cnrnlinc or aniline-roll, two parts of nihumcn, four pnrts oi' rock-cnntly or soluble gum, seven parts of printers varnish, molasses, glycerinc, or other material to give the proper consistency to it i A purple ink is prorluccrl hr using thrcc parts of lnkn or :rnilinmpnrplc, two pzrrts nt' nllnnucn, four parts of rock-candy 01' soluble gum, scvcn parts of printcrs varnish, moin scs, glyceriuc, or other matcrinls to give proper consistency.

To make ink of a blue slnule, I use five ports of soinhie Prussian-blue, twelve parts of rock eannl v or k soluble gum, fifteen parts printers varnish, moi-um, s, glyccrinc, or othcr materials to give the proper coni SiSiCllt), with :1 small propm'tion of cnhnlt or anilinehlue, to give it the. proper slnulc.

If a black ink is (lcsircd, I use ten parts of logwooil, treutcrl with n rln'onn'uc of potassium, one and onehnli part of soluble l'ilifiSiiiil-hill, one and one-hail' part of rock-candy or soluble gum, one and one-half part of printers varnish, molasses, glycerine, or other material to give it the properconsistency, with a smnii proportion of lump-Mack, or other jet Mack, to giv the proper shnric.

Cnnstio potnssn, nicohol, or other chemical Sui)- stnncc, it rcqnircri, may he used with the wnter, to nssisi; in transferring or developing the coior on the impression copy.

it will he seen, from the above, that the proportions are varied as tliii'crcnt shades are required.

Having than (iPSPl'iiN-lti my invention, its ingredients and proportions, V

What I claim, nml rlcsirc to secure by Letters Patent, is-

The nmnnhrctnre of printers ink, (that will presscopyg) containing pigments or coloring-mutter of flitfcrcnt shades, soluble inqveter, or pigments or coloring-matters that are insohihle in water, but which. when mixed with soluble gum, can he conveycd by such gums, snirl ingredients used therewith being in or about, the pro mrtions herein specified, in order vhnt the compounds resulting then-from mny accompiish the purpose act fort-h.

In testimony whereof I have hereunto signed my nnrno in the presence of two subscribing witnesses.

\Vitucsses: GIIARIJ'IS MCILVAIXB.

Isiuo R. ()AKFQIIH, (hunucs H. Em. 

